<template>
    <div>
         <!-- 面包屑导航区域 -->
    <el-breadcrumb separator="/">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>用户列表</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片视图 -->
    <el-card>
        <!-- 添加角色按钮区域 -->
        <el-row>
            <el-col>
                <el-button type="primary">添加角色</el-button>
            </el-col>
        </el-row>
        <el-table :data="rolesList" border stripe>
            <!-- 展开列 -->
            <el-table-column type="expand">
                <template slot-scope="scope">
                    <el-row :class="['bdbottom',i1 === 0 ? 'bdtop' : '','vcenter']" v-for="(item1,i1) in scope.row.children" :key="item1.id">
                        <!-- 渲染一级权限 -->
                        <el-col :span="5">
                            <el-tag closable @close="removeRightById(scope.row,item1.id)">{{item1.authName}}</el-tag>
                            <i class="el-icon-caret-right"></i>
                        </el-col>
                        <!-- 渲染二级和三级权限 -->
                        <el-col :span="19">
                            <!-- 通过for循环 嵌套渲染二级权限 -->
                            <el-row :class="[i2 === 0 ? '' : 'bdtop','vcenter']" v-for="(item2,i2) in item1.children" :key="item2.id">
                                <el-col :span="6">
                                    <el-tag type="success" closable @close="removeRightById(scope.row,item2.id)">{{item2.authName}}</el-tag>
                                    <i class="el-icon-caret-right"></i>
                                </el-col>
                                <el-col :span="18">
                                    <el-tag type="warning" v-for="(item3) in item2.children" :key="item3.id" closable @close="removeRightById(scope.row,item3.id)">{{item3.authName}}</el-tag>
                                </el-col>
                            </el-row>
                        </el-col>
                    </el-row>
                </template>
            </el-table-column>
            <!-- 索引列 -->
            <el-table-column type="index"></el-table-column>
            <el-table-column label="角色名称" prop="roleName"></el-table-column>
            <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
            <el-table-column label="操作">
                <template slot-scope="scope">
                    <!-- 修改 -->
                    <el-button type="primary" icon="el-icon-edit" size="mini">编辑</el-button>
                    <el-button type="danger" icon="el-icon-delete" size="mini">删除</el-button>
                    <el-button type="warning" icon="el-icon-setting" size="mini" @click="showSetRightDialog(scope.row)">分配权限</el-button>
                </template>
            </el-table-column>
        </el-table>
    </el-card>

    <!-- 分配权限对话框 -->
    <el-dialog
  title="分配权限"
  :visible.sync="setRightDialogVisible"
  width="50%"
  @close="setRightDialogClosed">
  <!-- 树形控件 -->
  <el-tree :data="rightslist" :props="treeProps" show-checkbox node-key="id" default-expand-all :default-checked-keys="defKeys" ref="treeRef"></el-tree>
  <span slot="footer" class="dialog-footer">
    <el-button @click="setRightDialogVisible = false">取 消</el-button>
    <el-button type="primary" @click="allotRights()">确 定</el-button>
  </span>
</el-dialog>
    </div>
</template>

<script>
export default {
    data(){
        return{
            //所有角色列表数据
            rolesList:[],
            //控制分配权限对话框的显示与隐藏
            setRightDialogVisible:false,
            //所有权限的数据
            rightslist: [],
            //树形控件的属性绑定对象
            treeProps:{
                label:'authName',
                children:'chiledren'
            },
            //默认选中的结点id值数组
            defKeys:[104],
            //当前即将分配权限的角色id
            roleId:''
        }
    },
    created(){
        this.getRolesList()
    },
    methods:{
        //所有角色列表
        async getRolesList(){
            const {data:res} = await this.$http.get('roles')
            if(res.meta.status != 200){
                return this.$message.error('获取角色列表失败')
            }
            this.rolesList = res.data
        },
        //根据id删除对应权限
        async removeRightById(role,rightId){
            //弹框提示
            const confirmResult = await this.$confirm('此操作将永久删除该文件, 是否继续?', '提示', {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }).catch(err => err)

        if(confirmResult != 'confirm'){
            return this.$message.info('取消了删除')
        }

        const {data:res} = await this.$http.delete(`roles/${role.id}/rights/${rightId}`)
        if(res.meta.status != 200){
            return this.$message.error('删除权限失败')
        }
        //this.getRolesList()
        role.children = res.data
        },

        //展示分配权限的对话框
        async showSetRightDialog(role){
            this.roleId = role.id
            
            //获取所有权限的数据
            const {data:res} = await this.$http.get('rights/tree')
            if(res.meta.status != 200){
                return this.$message.error('获取权限数据失败')
            }
            //把获取到的权限数据获取到data中
            this.rightslist = res.data
            console.log(this.rightslist)

            //递归获取三级节点的id
            this.getLeafsKeys(role,this.defKeys)
            this.setRightDialogVisible = true
        },

        //通过递归的形式，获取角色下所有三级权限的id，并保存到 defKeys 数组中
        getLeafsKeys(node,arr){
            // 如果当前 node 节点不包含 children 属性，则是三级节点
            if(!node.children){
                return arr.push(node.id)
            }

            node.children.forEach(item => this.getLeafsKeys(item,arr))
        },

        //监听分配权限对话框的关闭事件
        setRightDialogClosed(){
            this.defKeys = []
        },

        //点击为角色分配权限
        async allotRights(){
            const keys = [
                ...this.$refs.treeRef.getCheckedKeys(),
                ...this.$refs.treeRef.getHalfCheckedKeys()
            ]

            const idStr = keys.join(',')

            const {data:res} = await this.$http.post(`roles/${this.roleId}/rights`,{rids:idStr})
            if(res.meta.status != 200){
                return this.$message.error('分配权限失败')
            }

            this.$message.success('分配权限成功')
            this.getRolesList()
            this.setRightDialogVisible = false
        }
    }
}
</script>

<style lang="less" scoped>
    .el-tag{
        margin: 8px;
    }
    .bdtop{
        border-top: 1px solid #eee;
    }
    .bdbottom{
        border-bottom: 1px solid #eee;
    }
    .vcenter{
        display: flex;
        align-items: center;
    }
</style>